Regenerative furnace



. HUREZ.

REGENERATIVE FURNACE.

Af'PucATloN FILED MAR 19, 1917.

Patented Mar. 16, 1920.

EUGENE num, or PETI'rvcoUnoNNn'm-Gmncounonnn, Imola BEGENEMTIVE FUBACE.

Specification of Letters Patent.

Patented Maa-16,1920.

Application mea laren 19, 1917. l serial 10.155,37.

To all 'whom 'it may concern:-

Be it known that I, EUeNE-HUREz, a citizen of the French Republic, residing at Petit Couronne, near Grand Couronne',Sein e Infrieure, France, have invented a new and useful Re enerative Furnace, ofwhich -the following 1s a specification. A l y W' This invention relatesA to an improved construction of the upright lues of a regenerative furnace such for instance as Iacoke `oven of the usual type, in which each con- 'l tiguous pair of lues is traversed by the gas originallyv .in active combustion, and further on y the burned gases `limiting thusto the minimum the heatln zones of more or less intenslty created by t e-re-versmg which has for its object to invert the direction of the gaseous currents in the respective pair of flues. The gas clrculatlon 1s arranged so as to obtain automatically as uniform a' disi tribution aspossible of the combustion throughout each flue of the furnace. This condition is attainable by causing the gases of all "the circuits to traverse a course exactly of the same length and resistance.

4 Nevertheless in .spite of thistheoretic equality, circuits may be more or less un-` equal in practice by reason of the 'gas eddies which for various reasons are liable to occur in the lues. In order to overcome these irregularities it is requisite .that the' proper quantities of gas and air be introduced and controlled in al precise manner and each separately, at the base of the lues, lbefore they enter into combustion. l

In this type of furnace, the dividing walls between each pair of contiguous lines form'4 the special feature of this invention. These walls have such a construction that the heat evolved in Vthe flues during .the period of Avigorous combustion is applied particularly to the heating of the walls of the' coking' chamber and as little as possible to the heating (which is pure loss) ofthe adjacent lues which convey the burned lgases to the regenerators.

Figure 1 shows a vertical transverse section on the line 1-1 of`Fig.- 2 through the furnace, the flues andthe regenerators. y

Fig. 1 shows an inlet flue and damper on an enlarged Scale.

Fig. A2 shows an elevation and a partial section on the line 2 2 of Fig. 1 through the furnace, the fiues, the gas inlets, and the' f .rives the Referring. to the accompanying drawings,

regenerators4 withy greatercle'arnessparts i broken 'away for Fig. 3shows'a horizontal section ,on the l line A- B of Fi 2 and on an enlarged scale, of the insu ating `partitions forming an essential feature of my invention.

. In the furnace shown in these drawings' the as for heatinggthe iues is introduced at c an d (the latter serving asa .compensating -V channel) and passes through lthe inlets k into the maingas Hue between the hollow,

partitions.

the damper r usually closes only partially and seldom entirely the air admisslon conduit 7". It can never close-the conduit Ic, bein prevented by the-little projection R2. 1

Fig. 2 and the damper 1' can close the con per part ofthe furnace through theremov.

" able plugs t when it is necessary` to regulate the admlssion of the air. The gases arriving through -c pass into the flues ,which lues form large passages, and t e gases; A will not flow through theo en space at y the upper part of the structure y reason of the constriction of this latter. v-

The combustion ases pass at one time from the -right to t e left and at another time'from the left to the right and the insulating spaces b ofthe partitions avoid the losses of heat from one 'side wall to lthe other as indicated farther on. The construction may be briefly summarized as' follows The furnace comprises a series of flues separated by partitions in 'each of which partitions there is provided a closed chamber b for the purpose of avoiding the losses ofheat by transmission of heat from one wallA to vthe other. In the flue 'e there argas from the inletk and the air from the mlet 'r1 necessary for combustion. This air supply canbe more or less obstructed for control pur oses by means of a valve fr which is accessible from the top of the furnace through the movable plugs t. In these ues f the inlets of. the gas 'and of the air supply both dischar e. The s .ecial application heremade of t e princi e, al-

ready known in itself, of an insulatlng air4 Referring" particularly to 1 and 1**,i i

f 1g.v3 isasection on theline A-fB of I a 41 with reference'to the surface overvwhiohlthe novel, and the lfollowing explanation. will. as`

sist in demonstrating the technical effect Aobtained. l f

Taking two adjacent fines e, f. In the one ,e the* gas enters into combustion at the lower part of the viuef In the other f thevgas under combustion escapes from the flue also at the base. Consequently in the same horizontal section, 1,12 passing through these two flues, the gasesare in a very diiferent thermic condition in c, f, for in e the gas is atits maximum combustion, while at f it is 4at its minimum, the gas having given up its heat to the walls of the. furnace themselves walls of the ookingchamber. If the partition between e and f were solid the heating of the gas escaping'from f. would take place by reason of the iconductivityof this partition. lFurther with regard-tothe question of improving the useful heating of th'ecok ing chamber itis automatically realized ybyv the same section of the' partitions. whichl inclose the air shafts in question. For a` given 1 vertical fine, the 'exchange'fof heat between y the gas and the coal to be distilled which lieson the other side of the furnace wall will be the more effective in accordance as thesurface of interchange is'proportionately larger gas passes."

l The operation of the-colte oven'constructed in conformity with the foregoing'description l l is in other respects similar to that of such, u regenerative furnaces in generalg.' d Herejthe '4 'gases during combustion in the' iues 3,

31, z'andascend in'turn into theladjaicent@ flues f, f1, fzand then pass backto the corre-f 'In the next follow-v about half an hour after ,the rst) the lues f, f1, f2 receive the fresh com- 'I spending regenerator. ing period 'TWitnesses:

' bustion gases and the fines e, c1', e?" discharge them after combustion.

What I claim is:

1. In a regenerativel coke-oven of the ty set forth the combination' with means fi); controlling the combustion of gaseous fuel in the heating flue'of said oven of insulating air space within the middle division of said flue, around which the evolved combustion heat travels to the distillation chamber.

2. Ina regenerative coke-oven'of the type set forth; a hollow partition in each flue around which the gases under combustion travel and means for regulating ,the quantity and the direction of'flow of the ai'r and the gas respectively through said lues.

3. 'In aregenerative coke-oven of the type set forth, -a plurality of combustion iiues, a hollow middle wall in each flue forming an entirely closed space adapted 'to act as a heateconserving partition for the gases under combustion which flow over it, regulatable Y gasl inlets into said iues, hot air supply inlets into said flues and adjustable dampers ada ted to control the passagefthrough the saiv flues of gases under combustion.

4. In combination in 'a regenerative cokeoven `of the type set forth one or more divi-v 'sions inthe44 combustion fines of the coke- 'oven,' each division comprisingan inclosed chamber separating the sidesV of the division one fromlthe' other for the purpose of preu -ventingheat interchange between the burnt gases, and the gases undergoing combustion;

in combination with two contiguons chan;- nels traversed the y011e by the gases in combustion andthe otherby the burnt gases., for` 'the purpose of reducing to the minimum the heating'zones occasioned by the reversal of the gaseous currents.-

In testimony whereof Il sign my nameV to this 'specification in the presence oftwo sub-l witnesses. i f EUGENE HUREZ.`

Bnomorrn GEORGE, ANTOINE Jommg. 

